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Sulfonylation graphene oxide magnetic adsorbent, and preparation method and application thereof

A magnetic adsorbent, graphene technology, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal oxides/hydroxides, etc., can solve the problem of reduced adsorption sites, limited number of groups, and reduced adsorption capacity and other problems, to achieve the effect of many adsorption sites, easy separation and recovery, and short production cycle.

Inactive Publication Date: 2013-03-27
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the number of groups on the surface of magnetic nanoparticles is very limited, and some groups on the surface of graphene oxide are occupied during the assembly process, resulting in fewer adsorption sites and lower adsorption capacity.

Method used

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  • Sulfonylation graphene oxide magnetic adsorbent, and preparation method and application thereof
  • Sulfonylation graphene oxide magnetic adsorbent, and preparation method and application thereof
  • Sulfonylation graphene oxide magnetic adsorbent, and preparation method and application thereof

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Embodiment 1

[0026] A sulfonated graphene oxide magnetic adsorbent according to the present invention, the adsorbent includes a graphene oxide substrate, the substrate is loaded with magnetic ferrite nanoparticles and has a large number of sulfonic acid groups. The sulfonated graphene oxide magnetic adsorbent is prepared by the following method:

[0027] 6 g graphite powder, 5 g K 2 S 2 o 4 and 5 g P 2 o 5 Add it to 24 mL of concentrated sulfuric acid with a concentration of 98%, react at 80 °C for 4.5 hours, add 1000 mL of ultrapure water after cooling to room temperature, and wash the obtained product to neutrality after standing for 12 hours, then dry it at 60 °C Pre-oxidized graphene was obtained; the obtained pre-oxidized graphite was added to 240 mL of concentrated sulfuric acid with a concentration of 98%, and then 5 g of NaNO 3 and 30 g KMnO 4 , react at 0 °C for 4 hours, heat up to 35 °C for 2 hours, add 500 mL of ultrapure water, react at 98 °C for 1 hour, then add 1000 mL ...

Embodiment 2

[0032] The sulfonated graphene oxide magnetic adsorbent of the present invention is used to adsorb and treat copper ions in wastewater, comprising the following steps: taking 50 mL of Cu with an initial concentration of 5 to 100 mg / L 2+ solution, adjust the pH value of the solution to 5.0, add the sulfonated graphene oxide magnetic adsorbent prepared in Example 1, the amount of this adsorbent is 0.18 g / L, carry out the oscillation adsorption reaction at 30 ℃ of air bath constant temperature oscillator After 6 hours, the adsorbent was separated from the wastewater with a magnet, and the unadsorbed Cu in the wastewater was determined by flame atomic absorption method. 2+ The content of the calculated adsorption capacity is shown in Table 1:

[0033] Table 1: Different Cu 2+ The adsorption capacity data of the adsorbent under the condition of initial concentration

[0034]

[0035] It can be seen from Table 1 that the adsorbent has an adsorption capacity of 19.34 mg / g under ...

Embodiment 3

[0037] The sulfonated graphene oxide magnetic adsorbent of the present invention is used for adsorption and treatment of cadmium ions in wastewater, comprising the following steps: taking 20 mL of Cd with an initial concentration of 10 mg / L 2+ Solution, adjust the pH value of the solution to 6.0, add the sulfonated graphene oxide magnetic adsorbent obtained in Example 1, the consumption of the adsorbent is 0.34 g / L, carry out the oscillation adsorption reaction at 30 ℃ of water bath constant temperature oscillator, After 24 hours, the adsorbent was separated from the wastewater with a magnet, and the unadsorbed Cd in the wastewater was determined by flame atomic absorption spectrometry 2+ content, the adsorption capacity of this product to cadmium is 18.85 mg / g.

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Abstract

The invention relates to a sulfonylation graphene oxide magnetic adsorbent, and a preparation method and application thereof. The adsorbent uses graphene oxide nanosheet as a substrate; the substrate surface is loaded with magnetic ferrite nanoparticles, and contains a large amount of sulfonic acid. The method comprises the following specific steps: first subjecting a graphite powder to pre-oxidation and deep oxidation, and conducting ultrasonic separation to obtain a graphene oxide solution; then adding a mixed solution of iron ions and ferrous ions; rapidly adding ammonia solution while stirring to obtain magnetic graphene oxide; and finally grafting aminobenzene sulfonic acid to magnetic graphene oxide matrix, washing and determining a constant volume to obtain a final product. The product has good adsorption effect on the heavy metals, copper and cadmium, and organic aniline. The product has the advantages of low cost, large specific surface area, high adsorption capacity and easy separation and recovery. The invention can be used for treating wastewater from smelting factory, electronics factory, chemical plant and electroplating plant.

Description

technical field [0001] The invention belongs to the field of environmental functional materials and water treatment new technologies, and in particular relates to a sulfo-graphene oxide magnetic adsorbent and its preparation method and application. Background technique [0002] Heavy metal pollution and organic pollution are the most harmful water pollution problems. With the rapid development of industries such as mining, metal smelting, metal processing and chemical production, a large number of heavy metals and organic pollutants are discharged into water bodies. These pollutants directly or indirectly enter the human body through the food chain, accumulate and concentrate in the body, causing teratogenicity. , carcinogenic, mutagenic and other hazards. Therefore, it is urgent to find an efficient and economical technology to treat the wastewater discharged by enterprises. General wastewater treatment methods include ion exchange, chemical precipitation, electrodepositi...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30B01J20/28C02F1/28C02F1/58C02F1/62
Inventor 刘云国胡新将王慧柳思勉郭一明何缘李江李婷婷
Owner HUNAN UNIV
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